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treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288
[mirror_ubuntu-focal-kernel.git] / net / nfc / digital_technology.c
CommitLineData
2025cf9e 1// SPDX-License-Identifier: GPL-2.0-only
59ee2361
TE		 2/*
3 * NFC Digital Protocol stack
4 * Copyright (c) 2013, Intel Corporation.
59ee2361
TE		 5 */
6
c5da0e4a
SO		 7#define pr_fmt(fmt) "digital: %s: " fmt, __func__
8
59ee2361
TE		 9#include "digital.h"
10
11#define DIGITAL_CMD_SENS_REQ 0x26
12#define DIGITAL_CMD_ALL_REQ 0x52
13#define DIGITAL_CMD_SEL_REQ_CL1 0x93
14#define DIGITAL_CMD_SEL_REQ_CL2 0x95
15#define DIGITAL_CMD_SEL_REQ_CL3 0x97
16
17#define DIGITAL_SDD_REQ_SEL_PAR 0x20
18
19#define DIGITAL_SDD_RES_CT 0x88
20#define DIGITAL_SDD_RES_LEN 5
7f9f1713 21#define DIGITAL_SEL_RES_LEN 1
59ee2361 22
2c66daec
TE		 23#define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04))
24#define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60))
12e3d241 25#define DIGITAL_SEL_RES_IS_T4T(sel_res) ((sel_res) & 0x20)
7d0911c0 26#define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40)
2c66daec 27
13292c9a 28#define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00)
2c66daec 29#define DIGITAL_SENS_RES_IS_VALID(sens_res) \
13292c9a
TE		 30 ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \
31 (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00))
2c66daec
TE		 32
33#define DIGITAL_MIFARE_READ_RES_LEN 16
34#define DIGITAL_MIFARE_ACK_RES 0x0A
35
24734607
MG		 36#define DIGITAL_CMD_SENSB_REQ 0x05
37#define DIGITAL_SENSB_ADVANCED BIT(5)
38#define DIGITAL_SENSB_EXTENDED BIT(4)
39#define DIGITAL_SENSB_ALLB_REQ BIT(3)
40#define DIGITAL_SENSB_N(n) ((n) & 0x7)
41
42#define DIGITAL_CMD_SENSB_RES 0x50
43
44#define DIGITAL_CMD_ATTRIB_REQ 0x1D
45#define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6)
46#define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4)
47#define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3)
48#define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2)
49#define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6)
50#define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4)
51#define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8
52#define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf)
53
8c0695e4
TE		 54#define DIGITAL_CMD_SENSF_REQ 0x00
55#define DIGITAL_CMD_SENSF_RES 0x01
56
57#define DIGITAL_SENSF_RES_MIN_LENGTH 17
58#define DIGITAL_SENSF_RES_RD_AP_B1 0x00
59#define DIGITAL_SENSF_RES_RD_AP_B2 0x8F
60
61#define DIGITAL_SENSF_REQ_RC_NONE 0
62#define DIGITAL_SENSF_REQ_RC_SC 1
63#define DIGITAL_SENSF_REQ_RC_AP 2
64
a381d482
MG		 65#define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01
66
67#define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1)
68#define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2)
69#define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5)
70#define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0)
71#define DIGITAL_ISO15693_RES_IS_VALID(flags) \
72 (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR))
73
c813007f
TE		 74#define DIGITAL_ISO_DEP_I_PCB 0x02
75#define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01)
76
77#define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0)
78
79#define DIGITAL_ISO_DEP_I_BLOCK 0x00
80
81#define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08)
82
12e3d241
TE		 83static const u8 digital_ats_fsc[] = {
84 16, 24, 32, 40, 48, 64, 96, 128,
85};
86
87#define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F)
24734607 88#define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4)
12e3d241
TE		 89#define DIGITAL_ATS_MAX_FSC 256
90
91#define DIGITAL_RATS_BYTE1 0xE0
92#define DIGITAL_RATS_PARAM 0x80
93
2c66daec
TE		 94struct digital_sdd_res {
95 u8 nfcid1[4];
96 u8 bcc;
97} __packed;
98
99struct digital_sel_req {
100 u8 sel_cmd;
101 u8 b2;
102 u8 nfcid1[4];
103 u8 bcc;
104} __packed;
105
24734607
MG		 106struct digital_sensb_req {
107 u8 cmd;
108 u8 afi;
109 u8 param;
110} __packed;
111
112struct digital_sensb_res {
113 u8 cmd;
114 u8 nfcid0[4];
115 u8 app_data[4];
116 u8 proto_info[3];
117} __packed;
118
119struct digital_attrib_req {
120 u8 cmd;
121 u8 nfcid0[4];
122 u8 param1;
123 u8 param2;
124 u8 param3;
125 u8 param4;
126} __packed;
127
128struct digital_attrib_res {
129 u8 mbli_did;
130} __packed;
131
8c0695e4
TE		 132struct digital_sensf_req {
133 u8 cmd;
134 u8 sc1;
135 u8 sc2;
136 u8 rc;
137 u8 tsn;
138} __packed;
139
140struct digital_sensf_res {
141 u8 cmd;
142 u8 nfcid2[8];
143 u8 pad0[2];
144 u8 pad1[3];
145 u8 mrti_check;
146 u8 mrti_update;
147 u8 pad2;
148 u8 rd[2];
149} __packed;
150
a381d482
MG		 151struct digital_iso15693_inv_req {
152 u8 flags;
153 u8 cmd;
154 u8 mask_len;
155 u64 mask;
156} __packed;
157
158struct digital_iso15693_inv_res {
159 u8 flags;
160 u8 dsfid;
161 u64 uid;
162} __packed;
163
2c66daec
TE		 164static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
165 struct nfc_target *target);
166
c813007f
TE		 167int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev,
168 struct sk_buff *skb)
169{
170 u8 pcb;
171 u8 block_type;
172
173 if (skb->len < 1)
174 return -EIO;
175
176 pcb = *skb->data;
177 block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb);
178
179 /* No support fo R-block nor S-block */
180 if (block_type != DIGITAL_ISO_DEP_I_BLOCK) {
181 pr_err("ISO_DEP R-block and S-block not supported\n");
182 return -EIO;
183 }
184
185 if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) {
186 pr_err("DID field in ISO_DEP PCB not supported\n");
187 return -EIO;
188 }
189
190 skb_pull(skb, 1);
191
192 return 0;
193}
194
195int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev,
196 struct sk_buff *skb)
197{
198 /*
199 * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must
200 * not be greater than remote FSC
201 */
202 if (skb->len + 3 > ddev->target_fsc)
203 return -EIO;
204
205 skb_push(skb, 1);
206
207 *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni;
208
209 ddev->curr_nfc_dep_pni =
210 DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1);
211
212 return 0;
213}
214
12e3d241
TE		 215static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg,
216 struct sk_buff *resp)
217{
218 struct nfc_target *target = arg;
219 u8 fsdi;
220 int rc;
221
222 if (IS_ERR(resp)) {
223 rc = PTR_ERR(resp);
224 resp = NULL;
225 goto exit;
226 }
227
228 if (resp->len < 2) {
229 rc = -EIO;
230 goto exit;
231 }
232
233 fsdi = DIGITAL_ATS_FSCI(resp->data[1]);
234 if (fsdi >= 8)
235 ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
236 else
237 ddev->target_fsc = digital_ats_fsc[fsdi];
238
239 ddev->curr_nfc_dep_pni = 0;
240
241 rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443);
242
243exit:
244 dev_kfree_skb(resp);
245 kfree(target);
246
247 if (rc)
248 digital_poll_next_tech(ddev);
249}
250
251static int digital_in_send_rats(struct nfc_digital_dev *ddev,
252 struct nfc_target *target)
253{
254 int rc;
255 struct sk_buff *skb;
256
257 skb = digital_skb_alloc(ddev, 2);
258 if (!skb)
259 return -ENOMEM;
260
634fef61
JB		 261 skb_put_u8(skb, DIGITAL_RATS_BYTE1);
262 skb_put_u8(skb, DIGITAL_RATS_PARAM);
12e3d241
TE		 263
264 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats,
265 target);
266 if (rc)
267 kfree_skb(skb);
268
269 return rc;
270}
271
2c66daec
TE		 272static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
273 struct sk_buff *resp)
274{
275 struct nfc_target *target = arg;
276 int rc;
277 u8 sel_res;
278 u8 nfc_proto;
279
280 if (IS_ERR(resp)) {
281 rc = PTR_ERR(resp);
282 resp = NULL;
283 goto exit;
284 }
285
286 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
287 rc = digital_skb_check_crc_a(resp);
288 if (rc) {
289 PROTOCOL_ERR("4.4.1.3");
290 goto exit;
291 }
292 }
293
7f9f1713 294 if (resp->len != DIGITAL_SEL_RES_LEN) {
2c66daec
TE		 295 rc = -EIO;
296 goto exit;
297 }
298
299 sel_res = resp->data[0];
300
301 if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) {
302 rc = digital_in_send_sdd_req(ddev, target);
303 if (rc)
304 goto exit;
305
306 goto exit_free_skb;
307 }
308
12e3d241
TE		 309 target->sel_res = sel_res;
310
2c66daec
TE		 311 if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
312 nfc_proto = NFC_PROTO_MIFARE;
4b4dbca5
MG		 313 } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
314 nfc_proto = NFC_PROTO_NFC_DEP;
12e3d241
TE		 315 } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) {
316 rc = digital_in_send_rats(ddev, target);
317 if (rc)
318 goto exit;
319 /*
320 * Skip target_found and don't free it for now. This will be
321 * done when receiving the ATS
322 */
323 goto exit_free_skb;
2c66daec
TE		 324 } else {
325 rc = -EOPNOTSUPP;
326 goto exit;
327 }
328
2c66daec
TE		 329 rc = digital_target_found(ddev, target, nfc_proto);
330
331exit:
332 kfree(target);
333
334exit_free_skb:
335 dev_kfree_skb(resp);
336
337 if (rc)
338 digital_poll_next_tech(ddev);
339}
340
341static int digital_in_send_sel_req(struct nfc_digital_dev *ddev,
342 struct nfc_target *target,
343 struct digital_sdd_res *sdd_res)
344{
345 struct sk_buff *skb;
346 struct digital_sel_req *sel_req;
347 u8 sel_cmd;
348 int rc;
349
350 skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req));
351 if (!skb)
352 return -ENOMEM;
353
354 skb_put(skb, sizeof(struct digital_sel_req));
355 sel_req = (struct digital_sel_req *)skb->data;
356
357 if (target->nfcid1_len <= 4)
358 sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
359 else if (target->nfcid1_len < 10)
360 sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
361 else
362 sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
363
364 sel_req->sel_cmd = sel_cmd;
365 sel_req->b2 = 0x70;
366 memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4);
367 sel_req->bcc = sdd_res->bcc;
368
369 if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
370 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
371 NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
372 if (rc)
373 goto exit;
374 } else {
375 digital_skb_add_crc_a(skb);
376 }
377
378 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res,
379 target);
380exit:
381 if (rc)
382 kfree_skb(skb);
383
384 return rc;
385}
386
387static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg,
388 struct sk_buff *resp)
389{
390 struct nfc_target *target = arg;
391 struct digital_sdd_res *sdd_res;
392 int rc;
393 u8 offset, size;
394 u8 i, bcc;
395
396 if (IS_ERR(resp)) {
397 rc = PTR_ERR(resp);
398 resp = NULL;
399 goto exit;
400 }
401
402 if (resp->len < DIGITAL_SDD_RES_LEN) {
403 PROTOCOL_ERR("4.7.2.8");
404 rc = -EINVAL;
405 goto exit;
406 }
407
408 sdd_res = (struct digital_sdd_res *)resp->data;
409
410 for (i = 0, bcc = 0; i < 4; i++)
411 bcc ^= sdd_res->nfcid1[i];
412
413 if (bcc != sdd_res->bcc) {
414 PROTOCOL_ERR("4.7.2.6");
415 rc = -EINVAL;
416 goto exit;
417 }
418
419 if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) {
420 offset = 1;
421 size = 3;
422 } else {
423 offset = 0;
424 size = 4;
425 }
426
427 memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset,
428 size);
429 target->nfcid1_len += size;
430
431 rc = digital_in_send_sel_req(ddev, target, sdd_res);
432
433exit:
434 dev_kfree_skb(resp);
435
436 if (rc) {
437 kfree(target);
438 digital_poll_next_tech(ddev);
439 }
440}
441
442static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
443 struct nfc_target *target)
444{
445 int rc;
446 struct sk_buff *skb;
447 u8 sel_cmd;
448
449 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
450 NFC_DIGITAL_FRAMING_NFCA_STANDARD);
451 if (rc)
452 return rc;
453
454 skb = digital_skb_alloc(ddev, 2);
26042530 455 if (!skb)
2c66daec 456 return -ENOMEM;
2c66daec
TE		 457
458 if (target->nfcid1_len == 0)
459 sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
460 else if (target->nfcid1_len == 3)
461 sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
462 else
463 sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
464
634fef61
JB		 465 skb_put_u8(skb, sel_cmd);
466 skb_put_u8(skb, DIGITAL_SDD_REQ_SEL_PAR);
2c66daec
TE		 467
468 return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res,
469 target);
470}
471
59ee2361
TE		 472static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg,
473 struct sk_buff *resp)
474{
2c66daec 475 struct nfc_target *target = NULL;
2c66daec
TE		 476 int rc;
477
478 if (IS_ERR(resp)) {
479 rc = PTR_ERR(resp);
480 resp = NULL;
481 goto exit;
482 }
483
484 if (resp->len < sizeof(u16)) {
485 rc = -EIO;
486 goto exit;
487 }
488
489 target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
490 if (!target) {
491 rc = -ENOMEM;
492 goto exit;
493 }
494
13292c9a 495 target->sens_res = __le16_to_cpu(*(__le16 *)resp->data);
59ee2361 496
13292c9a 497 if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) {
2c66daec
TE		 498 PROTOCOL_ERR("4.6.3.3");
499 rc = -EINVAL;
500 goto exit;
501 }
502
13292c9a 503 if (DIGITAL_SENS_RES_IS_T1T(target->sens_res))
2c66daec
TE		 504 rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL);
505 else
506 rc = digital_in_send_sdd_req(ddev, target);
507
508exit:
509 dev_kfree_skb(resp);
510
511 if (rc) {
512 kfree(target);
513 digital_poll_next_tech(ddev);
514 }
59ee2361
TE		 515}
516
517int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech)
518{
519 struct sk_buff *skb;
520 int rc;
521
522 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
523 NFC_DIGITAL_RF_TECH_106A);
524 if (rc)
525 return rc;
526
527 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
528 NFC_DIGITAL_FRAMING_NFCA_SHORT);
529 if (rc)
530 return rc;
531
532 skb = digital_skb_alloc(ddev, 1);
533 if (!skb)
534 return -ENOMEM;
535
634fef61 536 skb_put_u8(skb, DIGITAL_CMD_SENS_REQ);
59ee2361
TE		 537
538 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL);
539 if (rc)
540 kfree_skb(skb);
541
542 return rc;
543}
2c66daec
TE		 544
545int digital_in_recv_mifare_res(struct sk_buff *resp)
546{
547 /* Successful READ command response is 16 data bytes + 2 CRC bytes long.
548 * Since the driver can't differentiate a ACK/NACK response from a valid
549 * READ response, the CRC calculation must be handled at digital level
550 * even if the driver supports it for this technology.
551 */
552 if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) {
553 if (digital_skb_check_crc_a(resp)) {
554 PROTOCOL_ERR("9.4.1.2");
555 return -EIO;
556 }
557
558 return 0;
559 }
560
561 /* ACK response (i.e. successful WRITE). */
562 if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) {
563 resp->data[0] = 0;
564 return 0;
565 }
566
567 /* NACK and any other responses are treated as error. */
568 return -EIO;
569}
8c0695e4 570
24734607
MG		 571static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg,
572 struct sk_buff *resp)
573{
574 struct nfc_target *target = arg;
575 struct digital_attrib_res *attrib_res;
576 int rc;
577
578 if (IS_ERR(resp)) {
579 rc = PTR_ERR(resp);
580 resp = NULL;
581 goto exit;
582 }
583
584 if (resp->len < sizeof(*attrib_res)) {
585 PROTOCOL_ERR("12.6.2");
586 rc = -EIO;
587 goto exit;
588 }
589
590 attrib_res = (struct digital_attrib_res *)resp->data;
591
592 if (attrib_res->mbli_did & 0x0f) {
593 PROTOCOL_ERR("12.6.2.1");
594 rc = -EIO;
595 goto exit;
596 }
597
598 rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B);
599
600exit:
601 dev_kfree_skb(resp);
602 kfree(target);
603
604 if (rc)
605 digital_poll_next_tech(ddev);
606}
607
cb30caf0 608static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev,
24734607
MG		 609 struct nfc_target *target,
610 struct digital_sensb_res *sensb_res)
611{
612 struct digital_attrib_req *attrib_req;
613 struct sk_buff *skb;
614 int rc;
615
616 skb = digital_skb_alloc(ddev, sizeof(*attrib_req));
617 if (!skb)
618 return -ENOMEM;
619
4df864c1 620 attrib_req = skb_put(skb, sizeof(*attrib_req));
24734607
MG		 621
622 attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ;
623 memcpy(attrib_req->nfcid0, sensb_res->nfcid0,
624 sizeof(attrib_req->nfcid0));
625 attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT |
626 DIGITAL_ATTRIB_P1_TR1_DEFAULT;
627 attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 |
628 DIGITAL_ATTRIB_P2_POLL_LISTEN_1 |
629 DIGITAL_ATTRIB_P2_MAX_FRAME_256;
630 attrib_req->param3 = sensb_res->proto_info[1] & 0x07;
631 attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0);
632
633 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res,
634 target);
635 if (rc)
636 kfree_skb(skb);
637
638 return rc;
639}
640
641static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg,
642 struct sk_buff *resp)
643{
644 struct nfc_target *target = NULL;
645 struct digital_sensb_res *sensb_res;
646 u8 fsci;
647 int rc;
648
649 if (IS_ERR(resp)) {
650 rc = PTR_ERR(resp);
651 resp = NULL;
652 goto exit;
653 }
654
655 if (resp->len != sizeof(*sensb_res)) {
656 PROTOCOL_ERR("5.6.2.1");
657 rc = -EIO;
658 goto exit;
659 }
660
661 sensb_res = (struct digital_sensb_res *)resp->data;
662
663 if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) {
664 PROTOCOL_ERR("5.6.2");
665 rc = -EIO;
666 goto exit;
667 }
668
669 if (!(sensb_res->proto_info[1] & BIT(0))) {
670 PROTOCOL_ERR("5.6.2.12");
671 rc = -EIO;
672 goto exit;
673 }
674
675 if (sensb_res->proto_info[1] & BIT(3)) {
676 PROTOCOL_ERR("5.6.2.16");
677 rc = -EIO;
678 goto exit;
679 }
680
681 fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]);
682 if (fsci >= 8)
683 ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
684 else
685 ddev->target_fsc = digital_ats_fsc[fsci];
686
687 target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
688 if (!target) {
689 rc = -ENOMEM;
690 goto exit;
691 }
692
693 rc = digital_in_send_attrib_req(ddev, target, sensb_res);
694
695exit:
696 dev_kfree_skb(resp);
697
698 if (rc) {
699 kfree(target);
700 digital_poll_next_tech(ddev);
701 }
702}
703
704int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech)
705{
706 struct digital_sensb_req *sensb_req;
707 struct sk_buff *skb;
708 int rc;
709
710 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
711 NFC_DIGITAL_RF_TECH_106B);
712 if (rc)
713 return rc;
714
715 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
716 NFC_DIGITAL_FRAMING_NFCB);
717 if (rc)
718 return rc;
719
720 skb = digital_skb_alloc(ddev, sizeof(*sensb_req));
721 if (!skb)
722 return -ENOMEM;
723
4df864c1 724 sensb_req = skb_put(skb, sizeof(*sensb_req));
24734607
MG		 725
726 sensb_req->cmd = DIGITAL_CMD_SENSB_REQ;
727 sensb_req->afi = 0x00; /* All families and sub-families */
728 sensb_req->param = DIGITAL_SENSB_N(0);
729
730 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res,
731 NULL);
732 if (rc)
733 kfree_skb(skb);
734
735 return rc;
736}
737
8c0695e4
TE		 738static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg,
739 struct sk_buff *resp)
740{
741 int rc;
7d0911c0 742 u8 proto;
8c0695e4
TE		 743 struct nfc_target target;
744 struct digital_sensf_res *sensf_res;
745
746 if (IS_ERR(resp)) {
747 rc = PTR_ERR(resp);
748 resp = NULL;
749 goto exit;
750 }
751
752 if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) {
753 rc = -EIO;
754 goto exit;
755 }
756
757 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
758 rc = digital_skb_check_crc_f(resp);
759 if (rc) {
760 PROTOCOL_ERR("6.4.1.8");
761 goto exit;
762 }
763 }
764
765 skb_pull(resp, 1);
766
767 memset(&target, 0, sizeof(struct nfc_target));
768
769 sensf_res = (struct digital_sensf_res *)resp->data;
770
771 memcpy(target.sensf_res, sensf_res, resp->len);
772 target.sensf_res_len = resp->len;
773
774 memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE);
775 target.nfcid2_len = NFC_NFCID2_MAXSIZE;
776
7d0911c0
TE		 777 if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 &&
778 target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2)
779 proto = NFC_PROTO_NFC_DEP;
780 else
781 proto = NFC_PROTO_FELICA;
782
783 rc = digital_target_found(ddev, &target, proto);
8c0695e4
TE		 784
785exit:
786 dev_kfree_skb(resp);
787
788 if (rc)
789 digital_poll_next_tech(ddev);
790}
791
792int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
793{
794 struct digital_sensf_req *sensf_req;
795 struct sk_buff *skb;
796 int rc;
797 u8 size;
798
799 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
800 if (rc)
801 return rc;
802
803 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
804 NFC_DIGITAL_FRAMING_NFCF);
805 if (rc)
806 return rc;
807
808 size = sizeof(struct digital_sensf_req);
809
810 skb = digital_skb_alloc(ddev, size);
811 if (!skb)
812 return -ENOMEM;
813
814 skb_put(skb, size);
815
816 sensf_req = (struct digital_sensf_req *)skb->data;
817 sensf_req->cmd = DIGITAL_CMD_SENSF_REQ;
818 sensf_req->sc1 = 0xFF;
819 sensf_req->sc2 = 0xFF;
820 sensf_req->rc = 0;
821 sensf_req->tsn = 0;
822
d58ff351 823 *(u8 *)skb_push(skb, 1) = size + 1;
8c0695e4
TE		 824
825 if (!DIGITAL_DRV_CAPS_IN_CRC(ddev))
826 digital_skb_add_crc_f(skb);
827
828 rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res,
829 NULL);
830 if (rc)
831 kfree_skb(skb);
832
833 return rc;
834}
1c7a4c24 835
a381d482
MG		 836static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev,
837 void *arg, struct sk_buff *resp)
838{
839 struct digital_iso15693_inv_res *res;
840 struct nfc_target *target = NULL;
841 int rc;
842
843 if (IS_ERR(resp)) {
844 rc = PTR_ERR(resp);
845 resp = NULL;
846 goto out_free_skb;
847 }
848
849 if (resp->len != sizeof(*res)) {
850 rc = -EIO;
851 goto out_free_skb;
852 }
853
854 res = (struct digital_iso15693_inv_res *)resp->data;
855
856 if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) {
857 PROTOCOL_ERR("ISO15693 - 10.3.1");
858 rc = -EINVAL;
859 goto out_free_skb;
860 }
861
862 target = kzalloc(sizeof(*target), GFP_KERNEL);
863 if (!target) {
864 rc = -ENOMEM;
865 goto out_free_skb;
866 }
867
868 target->is_iso15693 = 1;
869 target->iso15693_dsfid = res->dsfid;
870 memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid));
871
872 rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693);
873
874 kfree(target);
875
876out_free_skb:
877 dev_kfree_skb(resp);
878
879 if (rc)
880 digital_poll_next_tech(ddev);
881}
882
883int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech)
884{
885 struct digital_iso15693_inv_req *req;
886 struct sk_buff *skb;
887 int rc;
888
889 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
890 NFC_DIGITAL_RF_TECH_ISO15693);
891 if (rc)
892 return rc;
893
894 rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
895 NFC_DIGITAL_FRAMING_ISO15693_INVENTORY);
896 if (rc)
897 return rc;
898
899 skb = digital_skb_alloc(ddev, sizeof(*req));
900 if (!skb)
901 return -ENOMEM;
902
903 skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */
904 req = (struct digital_iso15693_inv_req *)skb->data;
905
906 /* Single sub-carrier, high data rate, no AFI, single slot
907 * Inventory command
908 */
909 req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE |
910 DIGITAL_ISO15693_REQ_FLAG_INVENTORY |
911 DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS;
912 req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ;
913 req->mask_len = 0;
914
915 rc = digital_in_send_cmd(ddev, skb, 30,
916 digital_in_recv_iso15693_inv_res, NULL);
917 if (rc)
918 kfree_skb(skb);
919
920 return rc;
921}
922
1c7a4c24
TE		 923static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
924{
925 struct sk_buff *skb;
926 int rc;
927
928 skb = digital_skb_alloc(ddev, 1);
929 if (!skb)
930 return -ENOMEM;
931
634fef61 932 skb_put_u8(skb, DIGITAL_SEL_RES_NFC_DEP);
1c7a4c24
TE		 933
934 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
935 digital_skb_add_crc_a(skb);
936
55537c7e
MG		 937 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
938 NFC_DIGITAL_FRAMING_NFCA_ANTICOL_COMPLETE);
939 if (rc) {
940 kfree_skb(skb);
941 return rc;
942 }
943
1c7a4c24
TE		 944 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req,
945 NULL);
946 if (rc)
947 kfree_skb(skb);
948
949 return rc;
950}
951
952static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg,
953 struct sk_buff *resp)
954{
955 int rc;
956
957 if (IS_ERR(resp)) {
958 rc = PTR_ERR(resp);
959 resp = NULL;
960 goto exit;
961 }
962
963 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
964 rc = digital_skb_check_crc_a(resp);
965 if (rc) {
966 PROTOCOL_ERR("4.4.1.3");
967 goto exit;
968 }
969 }
970
971 /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */
972
973 rc = digital_tg_send_sel_res(ddev);
974
975exit:
976 if (rc)
977 digital_poll_next_tech(ddev);
978
979 dev_kfree_skb(resp);
980}
981
982static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev)
983{
984 struct sk_buff *skb;
985 struct digital_sdd_res *sdd_res;
986 int rc, i;
987
988 skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res));
989 if (!skb)
990 return -ENOMEM;
991
992 skb_put(skb, sizeof(struct digital_sdd_res));
993 sdd_res = (struct digital_sdd_res *)skb->data;
994
995 sdd_res->nfcid1[0] = 0x08;
996 get_random_bytes(sdd_res->nfcid1 + 1, 3);
997
998 sdd_res->bcc = 0;
999 for (i = 0; i < 4; i++)
1000 sdd_res->bcc ^= sdd_res->nfcid1[i];
1001
55537c7e
MG		 1002 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1003 NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
1004 if (rc) {
1005 kfree_skb(skb);
1006 return rc;
1007 }
1008
1c7a4c24
TE		 1009 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req,
1010 NULL);
1011 if (rc)
1012 kfree_skb(skb);
1013
1014 return rc;
1015}
1016
1017static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg,
1018 struct sk_buff *resp)
1019{
1020 u8 *sdd_req;
1021 int rc;
1022
1023 if (IS_ERR(resp)) {
1024 rc = PTR_ERR(resp);
1025 resp = NULL;
1026 goto exit;
1027 }
1028
1029 sdd_req = resp->data;
1030
1031 if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 ||
1032 sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) {
1033 rc = -EINVAL;
1034 goto exit;
1035 }
1036
1037 rc = digital_tg_send_sdd_res(ddev);
1038
1039exit:
1040 if (rc)
1041 digital_poll_next_tech(ddev);
1042
1043 dev_kfree_skb(resp);
1044}
1045
1046static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev)
1047{
1048 struct sk_buff *skb;
1049 u8 *sens_res;
1050 int rc;
1051
1052 skb = digital_skb_alloc(ddev, 2);
1053 if (!skb)
1054 return -ENOMEM;
1055
1056 sens_res = skb_put(skb, 2);
1057
1058 sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF;
1059 sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF;
1060
55537c7e
MG		 1061 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1062 NFC_DIGITAL_FRAMING_NFCA_STANDARD);
1063 if (rc) {
1064 kfree_skb(skb);
1065 return rc;
1066 }
1067
1c7a4c24
TE		 1068 rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req,
1069 NULL);
1070 if (rc)
1071 kfree_skb(skb);
1072
1073 return rc;
1074}
1075
1076void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
1077 struct sk_buff *resp)
1078{
1079 u8 sens_req;
1080 int rc;
1081
1082 if (IS_ERR(resp)) {
1083 rc = PTR_ERR(resp);
1084 resp = NULL;
1085 goto exit;
1086 }
1087
1088 sens_req = resp->data[0];
1089
1090 if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ &&
1091 sens_req != DIGITAL_CMD_ALL_REQ)) {
1092 rc = -EINVAL;
1093 goto exit;
1094 }
1095
1096 rc = digital_tg_send_sens_res(ddev);
1097
1098exit:
1099 if (rc)
1100 digital_poll_next_tech(ddev);
1101
1102 dev_kfree_skb(resp);
1103}
1104
4b8b6267
MG		 1105static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev,
1106 void *arg, struct sk_buff *resp)
1107{
1108 if (!IS_ERR(resp) && (resp->len >= 2) &&
1109 (resp->data[1] == DIGITAL_CMD_SENSF_REQ))
1110 digital_tg_recv_sensf_req(ddev, arg, resp);
1111 else
1112 digital_tg_recv_atr_req(ddev, arg, resp);
1113
1114 return;
1115}
1116
180106bd 1117static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
1c7a4c24
TE		 1118 struct digital_sensf_req *sensf_req)
1119{
1120 struct sk_buff *skb;
1121 u8 size;
1122 int rc;
1123 struct digital_sensf_res *sensf_res;
1124
1125 size = sizeof(struct digital_sensf_res);
1126
96e829b4 1127 if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE)
1c7a4c24
TE		 1128 size -= sizeof(sensf_res->rd);
1129
1130 skb = digital_skb_alloc(ddev, size);
1131 if (!skb)
1132 return -ENOMEM;
1133
1134 skb_put(skb, size);
1135
1136 sensf_res = (struct digital_sensf_res *)skb->data;
1137
1138 memset(sensf_res, 0, size);
1139
1140 sensf_res->cmd = DIGITAL_CMD_SENSF_RES;
1141 sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
1142 sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
1143 get_random_bytes(&sensf_res->nfcid2[2], 6);
1144
1145 switch (sensf_req->rc) {
1146 case DIGITAL_SENSF_REQ_RC_SC:
1147 sensf_res->rd[0] = sensf_req->sc1;
1148 sensf_res->rd[1] = sensf_req->sc2;
1149 break;
1150 case DIGITAL_SENSF_REQ_RC_AP:
1151 sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1;
1152 sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2;
1153 break;
1154 }
1155
d58ff351 1156 *(u8 *)skb_push(skb, sizeof(u8)) = size + 1;
1c7a4c24
TE		 1157
1158 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
1159 digital_skb_add_crc_f(skb);
1160
1161 rc = digital_tg_send_cmd(ddev, skb, 300,
4b8b6267 1162 digital_tg_recv_atr_or_sensf_req, NULL);
1c7a4c24
TE		 1163 if (rc)
1164 kfree_skb(skb);
1165
1166 return rc;
1167}
1168
1169void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
1170 struct sk_buff *resp)
1171{
1172 struct digital_sensf_req *sensf_req;
1173 int rc;
1174
1175 if (IS_ERR(resp)) {
1176 rc = PTR_ERR(resp);
1177 resp = NULL;
1178 goto exit;
1179 }
1180
1181 if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
1182 rc = digital_skb_check_crc_f(resp);
1183 if (rc) {
1184 PROTOCOL_ERR("6.4.1.8");
1185 goto exit;
1186 }
1187 }
1188
1189 if (resp->len != sizeof(struct digital_sensf_req) + 1) {
1190 rc = -EINVAL;
1191 goto exit;
1192 }
1193
1194 skb_pull(resp, 1);
1195 sensf_req = (struct digital_sensf_req *)resp->data;
1196
1197 if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) {
1198 rc = -EINVAL;
1199 goto exit;
1200 }
1201
1202 rc = digital_tg_send_sensf_res(ddev, sensf_req);
1203
1204exit:
1205 if (rc)
1206 digital_poll_next_tech(ddev);
1207
1208 dev_kfree_skb(resp);
1209}
1210
bf30a67c 1211static int digital_tg_config_nfca(struct nfc_digital_dev *ddev)
1c7a4c24
TE		 1212{
1213 int rc;
1214
bf30a67c
MG		 1215 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
1216 NFC_DIGITAL_RF_TECH_106A);
1c7a4c24
TE		 1217 if (rc)
1218 return rc;
1219
bf30a67c
MG		 1220 return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1221 NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
1222}
1223
1224int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech)
1225{
1226 int rc;
1227
1228 rc = digital_tg_config_nfca(ddev);
1c7a4c24
TE		 1229 if (rc)
1230 return rc;
1231
1232 return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL);
1233}
1234
bf30a67c 1235static int digital_tg_config_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
1c7a4c24
TE		 1236{
1237 int rc;
1c7a4c24
TE		 1238
1239 rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
1240 if (rc)
1241 return rc;
1242
bf30a67c
MG		 1243 return digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
1244 NFC_DIGITAL_FRAMING_NFCF_NFC_DEP);
1245}
1246
1247int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
1248{
1249 int rc;
bf30a67c
MG		 1250
1251 rc = digital_tg_config_nfcf(ddev, rf_tech);
1c7a4c24
TE		 1252 if (rc)
1253 return rc;
1254
b7769344 1255 return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, NULL);
1c7a4c24 1256}
bf30a67c
MG		 1257
1258void digital_tg_recv_md_req(struct nfc_digital_dev *ddev, void *arg,
1259 struct sk_buff *resp)
1260{
1261 u8 rf_tech;
1262 int rc;
1263
1264 if (IS_ERR(resp)) {
1265 resp = NULL;
1266 goto exit_free_skb;
1267 }
1268
1269 rc = ddev->ops->tg_get_rf_tech(ddev, &rf_tech);
1270 if (rc)
1271 goto exit_free_skb;
1272
1273 switch (rf_tech) {
1274 case NFC_DIGITAL_RF_TECH_106A:
1275 rc = digital_tg_config_nfca(ddev);
1276 if (rc)
1277 goto exit_free_skb;
1278 digital_tg_recv_sens_req(ddev, arg, resp);
1279 break;
1280 case NFC_DIGITAL_RF_TECH_212F:
1281 case NFC_DIGITAL_RF_TECH_424F:
1282 rc = digital_tg_config_nfcf(ddev, rf_tech);
1283 if (rc)
1284 goto exit_free_skb;
1285 digital_tg_recv_sensf_req(ddev, arg, resp);
1286 break;
1287 default:
1288 goto exit_free_skb;
1289 }
1290
1291 return;
1292
1293exit_free_skb:
1294 digital_poll_next_tech(ddev);
1295 dev_kfree_skb(resp);
1296}
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